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<pre><span class="comment"> /****************************************************************************
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 ** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
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 #ifndef FILEMANAGER_H
 #define FILEMANAGER_H

 class QByteArray;
 class QFile;
 class QTimerEvent;

 #include &lt;QBitArray&gt;
 #include &lt;QList&gt;
 #include &lt;QMutex&gt;
 #include &lt;QThread&gt;
 #include &lt;QWaitCondition&gt;

 #include &quot;metainfo.h&quot;

 class FileManager : public QThread
 {
     Q_OBJECT

 public:
     FileManager(QObject *parent = 0);
     virtual ~FileManager();

     inline void setMetaInfo(const MetaInfo &amp;info) { metaInfo = info; }
     inline void setDestinationFolder(const QString &amp;directory) { destinationPath = directory; }

     int read(int pieceIndex, int offset, int length);
     void write(int pieceIndex, int offset, const QByteArray &amp;data);
     void verifyPiece(int pieceIndex);
     inline qint64 totalSize() const { return totalLength; }

     inline int pieceCount() const { return numPieces; }
     int pieceLengthAt(int pieceIndex) const;

     QBitArray completedPieces() const;
     void setCompletedPieces(const QBitArray &amp;pieces);

     QString errorString() const;

 public slots:
     void startDataVerification();

 signals:
     void dataRead(int id, int pieceIndex, int offset, const QByteArray &amp;data);
     void error();
     void verificationProgress(int percent);
     void verificationDone();
     void pieceVerified(int pieceIndex, bool verified);

 protected:
     void run();

 private slots:
     bool verifySinglePiece(int pieceIndex);
     void wakeUp();

 private:
     bool generateFiles();
     QByteArray readBlock(int pieceIndex, int offset, int length);
     bool writeBlock(int pieceIndex, int offset, const QByteArray &amp;data);
     void verifyFileContents();

     struct WriteRequest {
         int pieceIndex;
         int offset;
         QByteArray data;
     };
     struct ReadRequest {
         int pieceIndex;
         int offset;
         int length;
         int id;
     };

     QString errString;
     QString destinationPath;
     MetaInfo metaInfo;
     QList&lt;QFile *&gt; files;
     QList&lt;QByteArray&gt; sha1s;
     QBitArray verifiedPieces;

     bool newFile;
     int pieceLength;
     qint64 totalLength;
     int numPieces;
     int readId;
     bool startVerification;
     bool quit;
     bool wokeUp;

     QList&lt;WriteRequest&gt; writeRequests;
     QList&lt;ReadRequest&gt; readRequests;
     QList&lt;int&gt; pendingVerificationRequests;
     QList&lt;int&gt; newPendingVerificationRequests;
     QList&lt;qint64&gt; fileSizes;

     mutable QMutex mutex;
     mutable QWaitCondition cond;
 };

 #endif</pre>
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